Evening star. [volume] (Washington, D.C.) 1854-1972, 1887-03-05

solid wood: and this is but the, forerunner OF
the spot, and which, though hidden meanwhile
from view, soon carry the destruction from the in
jured to the non-injured parts.r
future especially the soft maple win begin to fail
and perish from the ravages OF Borers as q result
Of reckless pruning than that they win ever be
seriously or permanently injured by leaf-eaters.
These last, as we have seen, may be overcome, but
the BoreB are not only more deadly, but more
difficult to manage.
TREES WHICH ARE uNMJuRKp.
have already indicated few OF the trees which
are most subject to injury from this web-worm
There is also quite list of trees which are either
very little affected or are never attacked and In
this connection it may be well to mention few OF
every other way, desirabie Tor shade trees and
sioners substitutes for those, like the Box Ed.
desirable trees which have immunity would men,
ton: Tulip tree (Lfriodendron fulip)era L.;
Re sugar NwaS aDd wSte5 N Maps
gls5ra Wiiid,]: Honey Locust lGieditsenia t,1as
canadensis, Lamb; Priekly Ash tzanutozylum
anericununa ny; sour Gum (Nyssa nultJ1ora,
Wangerhl: Beech {F's9us Je7ruginea Att; YeS
GOOD AND BAD RFFRcrs OF QUE rRxRs
The beauty OF Washington is very greatly en-
HANGED by its shade trees and the parking commits
sion deserve very great credit for the gigantic work
they have carried out In the last fifteen years
But while these trees are and ought to be in
the future an intending source OF pleasure and
healthfulneSs yet here as is so often the case the
good has some corresponding evil. This last, how
malarial troubles in washington and the Potomac
fats come in for nearly the entire blame. During
the month OF October our streets are constantly
covered with fallen leaves from our shade trees
eddying and whirl1ng about and carried by every
heavy rain into the sewer traps. Now, however,
Vigil Sga1 IT. the II %y be during
ns foP sser esanisg
this, vast masses OF black, decomposing and reek-
ing leaves are left to tester during the late fall and
early winter, and even through the whole winter,
sending forth their injurious and tnSdOuS emana-
lions from every street corner. From personal
experience am convinced that this is source of
much sickness hitherto almost entirely overlooked
and 1t behOOveS the authorities to have the
traps ON all the tree planted streets thoroughly
cleaned out Immediately after the trees have be-
come essentially bare.
PRosPEcTs THE COMING sRAsoN-coNcLus1oN
From the habits Of the Orgy1a as compared with
the Web-worm there is good reason to believe that
the former will become in the future more and
more numerous, and more and more OF a nuisance,
Just as 1t has become the most grievous pest in
Boston and Philadelphia and other cities where the
ton OF the Webworm nuisance the coming season,
the probabilities are that 1t Will be very much less
troublesome than it was in 1886. 1t is almost a
universal rule In insect life that abnormal in
crease Of q plant-feeding species is followed by
sudden check. This is due to two causes.
and natural enemies of the species which such I'M
due increase permits. Secondly. To the greater
feebleneSS and tendency to disease resulting from
insufficient food which is very general accom-
paniment OF such undue increase. From the dis
eased condition in which the bulk OF the last gen.
Grafton OF the Web-worm was found, from the
great increase in Its parasites that we know to
have taken place from actual observation we may
safely expect exceptional immunity the present